click below
click below
Normal Size Small Size show me how
Chapter 8 quiz 1
Term | Definition |
---|---|
Accommodation | Ability to focus for close vision |
Accommodation pupillary reflex | reflex constriction of the pupils when viewing close objects |
astigmatism | blurred vision, resulting from unequal curvatures of the lens or cornea |
Cataract | clouding of the lens resulting in loss of sight |
convergence | medial movement of the eyes during focusing on close objects |
Emmetropia | normal vision |
Glaucoma | condition of increasing pressure inside the eye, resulting from blocked drainage of aqueous humore |
hyperopia | inability to focus well on close objects; farsightedness |
myopia | nearsightedness |
night blindness | inability to see well in the dark; often a result of vitamin A deficiency |
Photopupillary reflex | reflex constriction of pupils when they are exposed to bright light |
refraction | light bending |
aqueous humor | fluid in the anterior segment that provides nutrients to the lens and cornea |
sclera | the "white" of the eye |
optic disk | area of retina that lacks photoreceptors |
retina | layer containg the rods and cones |
vitreous humor | gel-like substance that helps to reinforce the eyeball |
choroid | nutritive (vascular) layer of the eye |
Cornea | most anterior part of the sclera- your window world |
iris | pigmented "diaphragm" of the eye |